セミサブ型超大型浮体周囲の波浪減衰について(第2報)

概要

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In that first report, the decay characteristics of waves incident to an array of cylinders were investigated. The cylinders are considered as apart of the supporting legs of a very large floating structure. Maniar & Newman have recently shown that certain resonant phenomena occur, at least numerically, in a long array of equally spaced cylinders fixed in head waves. surface elevations between adjacent cylinders or the forces on each cylinder could reach as high as 20 times the corresponding quantities experienced by a single isolated cylinder. Numerical facts also suggest that the surface elevations or the forces decay from the head of the array toward the end of the array quite uniformly in incident waves of higher frequencies whereas they are enhanced rather than be decayed in incident waves of lower frequencies than the resonant frequencies. The purpose of this second report is to examine what happens around the resonant frequencies in real phenomena. The implications of the possible resonant phenomena on the hydroelastic behaviours in waves of a leg-supported VLFS are also examined.
社団法人日本船舶海洋工学会の論文